Bug 2044415 (CVE-2021-44647)

Summary:	CVE-2021-44647 lua: type confusion in funcnamefromcode in ldebug.c could result in local DoS
Product:	[Other] Security Response	Reporter:	Michael Kaplan <mkaplan>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	4le, asn, bdettelb, caswilli, csutherl, drjohnson1, fjansen, gzaronik, jburrell, jclere, jwon, kaycoth, krathod, lua-packagers-sig, mhroncok, michel, mturk, packaging-team-maint, pjindal, rob.myers, spotrh, szappis, tkasparek
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in Lua. An SEGV crash in the funcnamefromcode() function in ldebug.c during error handling occurs in '__close' metamethods. This flaw allows an attacker to cause a denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-01-28 07:30:57 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2044416
Bug Blocks:	2044418

Description Michael Kaplan 2022-01-24 15:05:58 UTC

Lua 5.4.4 and 5.4.2 are affected by SEGV by type confusion in funcnamefromcode function in ldebug.c which can cause a local denial of service.

References:

http://lua-users.org/lists/lua-l/2021-11/msg00204.html
http://lua-users.org/lists/lua-l/2021-11/msg00195.html

Comment 1 Michael Kaplan 2022-01-24 15:06:10 UTC

Created lua tracking bugs for this issue:

Affects: fedora-all [bug 2044416]

Comment 2 juneau 2022-01-24 16:43:02 UTC

Marked all /services "notaffected." No 5.4.x versions of Lua found in service manifests.

Comment 4 Product Security DevOps Team 2022-01-28 07:30:54 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-44647